01 -
Preheat the oven to 220°C and line a baking sheet with parchment paper.
02 -
Peel, seed, and chop the butternut squash into 2.5 cm cubes. Arrange on the prepared baking sheet and drizzle with olive oil. Sprinkle with garlic powder and salt, and toss to coat.
03 -
Bake the seasoned squash for 30 minutes, until completely tender and lightly browned.
04 -
Transfer the roasted squash to a food processor. Add ricotta cheese, parmesan cheese, 0.25 teaspoon salt, black pepper, thyme leaves, and water. Blend until a smooth sauce forms.
05 -
Bring a large pot of salted water to a boil. Cook the rigatoni until al dente according to package instructions. Reserve 1 cup of pasta water, then drain.
06 -
Pour the blended squash sauce into a large pan over medium heat. Add drained pasta and toss to coat, adding reserved pasta water as needed to achieve a creamy consistency. Stir for 30 seconds.
07 -
Distribute the pasta onto plates, then garnish with fresh thyme leaves, pistachio nuts, and extra grated parmesan cheese if desired.